Looking for a bit of advice
Just done the main bearings on my 06 rev3 250, put it all back together
, started it up and it runs fine and sounds perfect. Took it out for a run and after about 10/ 15 mins it started to make a noise that sounded a bit like a top end rattle or knock then start to die then cut out but it started up again straight away and sounded perfect, then after another few mins same again but this time didn't cut out as I managed to keep it going by pulling the clutch in and catching it on the throttle. If I go and start it now it will go first kick and sound spot on, it only seems to happen after a wee while when its under load.
The only other thing I have done is change the jets to the factory ones,27.5 and 145 I think.
Any suggestions ????